{"product_id":"off-grid-wind-power-system-of-marlec-fm1803-2-48v-wind-turbine-840w-9-6kwh-battery-multiplus-ii-3kw-inverter","title":"Off-grid Wind Power System | Marlec FM1803-2 48V 840W Turbine, 9.6kWh Battery, 3kW Inverter","description":"\u003cdiv style=\"font-size: 16px; line-height: 1.6;\"\u003e\n\u003ch1 style=\"text-align: center;\"\u003eOff‑grid Wind Power System – Marlec FM1803‑2 48V Wind Turbine 840W, 9.6kWh AGM Battery and Victron MultiPlus‑II 3kVA Inverter\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eRugged off‑grid wind power system combining a proven 48V Marlec Rutland FM1803‑2 wind turbine with 9.6kWh of sealed AGM storage and a Victron MultiPlus‑II 3kVA inverter\/charger.\u003c\/li\u003e\n\u003cli\u003eDesigned for reliable 230V AC power at windy, exposed, remote UK and overseas sites where there is limited solar resource that need power year-round. \u003c\/li\u003e\n\u003cli\u003eBacked by UK‑based technical support.\u003c\/li\u003e\n\u003cli\u003eOptions are available: different size battery banks, generators, solar power. \u003ca href=\"https:\/\/www.energian.co.uk\/pages\/contact-us\"\u003eContact us\u003c\/a\u003e for details and a custom quote. \u003c\/li\u003e\n\u003cli\u003eImportant note: this system cannot be combined with an existing on-grid solar installation and is not recommended for use in built-up and inland areas.\u003c\/li\u003e\n\u003cli\u003eWe can estimate the output from this system on request.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis off‑grid wind power system brings together the Marlec Rutland FM1803‑2 48V Furlmatic wind turbine, a 48V 200Ah Rolls AGM battery bank (9.6kWh at 48V) and a Victron MultiPlus‑II inverter\/charger to deliver dependable AC and DC power for remote applications such as telecoms, monitoring stations, and off‑grid cabins.\u003c\/p\u003e\n\u003cp\u003eThe 1.8m diameter Rutland FM1803‑2 turbine is designed for land‑based sites, using a high‑voltage three‑phase alternator and MPC‑2 controller to charge the 48V battery bank, while the MultiPlus‑II provides a 230V AC supply and integrated battery charging when a generator is available.\u003c\/p\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven 48V wind turbine\u003c\/strong\u003e – Marlec’s Rutland FM1803‑2 Furlmatic Windcharger with 1.8m rotor diameter, furling tail protection and up to 840W peak output in strong winds (48V variant).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.6kWh sealed AGM storage\u003c\/strong\u003e – Four Rolls R12‑200AGM 12V 200Ah deep‑cycle AGM batteries in series for 48V, maintenance‑free with M8 terminals and robust high‑rate performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVictron MultiPlus‑II inverter\/charger\u003c\/strong\u003e – 48\/3000\/35‑32 model providing 3kVA (2400W continuous at 25°C) 230V output, integrated charger and PowerAssist capability for generator support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimised for long cable runs\u003c\/strong\u003e – High‑voltage three‑phase output from the turbine and MPC‑2 controller allow siting the tower in the best wind location while keeping cable sizes modest.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible off‑grid architecture\u003c\/strong\u003e – Suitable as a stand‑alone wind system or as part of a wider hybrid setup with solar and generator backup, using Victron’s control and monitoring ecosystem.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhere to use this system\u003c\/h2\u003e\n\u003cp\u003eThis off‑grid wind power kit is suitable for permanent or long‑term remote installations where continuous or frequent power is needed and site access is limited. Typical use cases include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelecommunications and data\u003c\/strong\u003e – Remote masts, microwave links, repeaters and IoT gateways requiring stable 48V DC and 230V AC power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitoring and control\u003c\/strong\u003e – Environmental monitoring stations, instrumentation, traffic and seismic monitoring equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLighting and security\u003c\/strong\u003e – CCTV systems, street or compound lighting and security infrastructure in off‑grid or hard‑to‑reach locations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote buildings\u003c\/strong\u003e – Off‑grid cabins, welfare units, site offices and small off‑grid homes needing reliable power year round.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor safety, compliance and long‑term performance, we recommend installation by a qualified installer using appropriate tower foundations, protection devices and commissioning procedures. Energian can introduce trusted UK partners familiar with off-grid power equipment.\u003c\/p\u003e\n\u003ch2\u003eTechnical specifications \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurbine type:\u003c\/strong\u003e Rutland FM1803‑2 Furlmatic Windcharger, land‑based wind turbine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurbine diameter:\u003c\/strong\u003e 1.8m rotor diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of blades:\u003c\/strong\u003e 3 aerofoil blades, fixed pitch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlade construction:\u003c\/strong\u003e Individually injection‑moulded, glass‑filled mouldings with nose cone for airflow to the rotor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenerator type:\u003c\/strong\u003e Low‑torque, three‑phase brushless AC generator with high‑power rare‑earth magnets and low‑friction bearings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenerator output (typical):\u003c\/strong\u003e Variable‑frequency AC at approximately 120V line‑to‑line under normal conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYaw system:\u003c\/strong\u003e Sliprings and brushgear enabling 360° free yaw to seek the wind without cable twist.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCut‑in behaviour:\u003c\/strong\u003e Aerodynamic rotor runs in approximately 2m\/s winds; generation starts at about 3m\/s.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtective furling:\u003c\/strong\u003e Mechanical furling tail system; wind speeds over 15m\/s (approx. 35mph \/ 56kph) cause the offset tail fin to turn the turbine out of the wind, reducing rotor speed and generator load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction materials:\u003c\/strong\u003e Aluminium, stainless steel, glass‑filled injection mouldings and high‑quality paint finishes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable voltages:\u003c\/strong\u003e 12V, 24V and 48V versions. (This system uses the 48V model.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMPC‑2 Controller (included)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary functions:\u003c\/strong\u003e Transforms and rectifies high‑voltage AC from the turbine to DC for battery charging; electronically optimises turbine performance; prevents battery overcharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating modes:\u003c\/strong\u003e Low and high wind modes switch power ratios to optimise rotor performance across varying wind speeds and increase daily energy yields.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery regulation:\u003c\/strong\u003e Charges continuously until batteries reach 14.4V per 12V segment, then switches to stall mode; resumes charging when voltage falls to 12.5V per 12V segment (for lead‑acid settings).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal protection:\u003c\/strong\u003e Over‑temperature electronic shutdown with fan cooling; turbine is temporarily stalled when high internal controller temperatures are detected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay and controls:\u003c\/strong\u003e Backlit LCD display showing mode, battery volts, Amps, Watts and Ampere hours; Run \/ Stall \/ Reset button.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor connections:\u003c\/strong\u003e Temperature compensation sensor; optional remote voltage sensor for batteries located more than 1.5m away; serial data socket for remote display or programming; remote shutdown connection point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRun\/Stop switch:\u003c\/strong\u003e Separate switch supplied for connection between turbine and controller to park the turbine when required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical specifications – Rolls R12‑200AGM batteries (per battery)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e R12‑200AGM, Rolls AGM 12V deep‑cycle sealed maintenance‑free battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal voltage:\u003c\/strong\u003e 12V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated capacity (20‑hour rate):\u003c\/strong\u003e 200Ah.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity at 100‑hour rate:\u003c\/strong\u003e 220Ah (at 25°C).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity at 10‑hour rate:\u003c\/strong\u003e 162Ah (at 25°C).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal resistance:\u003c\/strong\u003e 4mΩ (fully charged at 25°C).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity vs temperature (20‑hour rate):\u003c\/strong\u003e 102% at 40°C; 100% at 25°C; 85% at 0°C; 65% at −15°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf‑discharge at 25°C:\u003c\/strong\u003e 91% remaining after 3 months; 82% after 6 months; 64% after 12 months.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum discharge current:\u003c\/strong\u003e 2000A (5 seconds) at 25°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReserve capacity:\u003c\/strong\u003e 400 minutes at 25A; 100 minutes at 75A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold cranking amps:\u003c\/strong\u003e 1500 CCA at 0°C; 1300 CCA at −18°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharging (constant‑voltage, at 25°C):\u003c\/strong\u003e Cycle use 14.6–14.8V; float use 13.6–13.8V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e Standard F‑M8.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Length 530mm; width 209mm; height 214mm; total height including terminals 219mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 56.0kg per battery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical specifications – Victron MultiPlus‑II 48\/3000\/35‑32\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e MultiPlus‑II 48\/3000\/35‑32, 230V inverter\/charger.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC input voltage range:\u003c\/strong\u003e 48V DC, 38–66V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC output:\u003c\/strong\u003e 230VAC ±2%, 50Hz ±0.1% (adjustable to 60Hz).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous output power at 25°C:\u003c\/strong\u003e 3000VA \/ 2400W (non‑linear load, crest factor 3:1).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous output power at 40°C:\u003c\/strong\u003e 2200W.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous output power at 65°C:\u003c\/strong\u003e 1700W.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak power:\u003c\/strong\u003e 5500W.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum efficiency:\u003c\/strong\u003e up to 95%.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero‑load power:\u003c\/strong\u003e 11W (48V model).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero‑load AES mode:\u003c\/strong\u003e 7W.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero‑load Search mode:\u003c\/strong\u003e 2W.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransfer switch rating:\u003c\/strong\u003e 32A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum AC input current:\u003c\/strong\u003e 32A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery charger:\u003c\/strong\u003e Max battery charge current 35A for 48V model; absorption voltage 57.6V; float 55.2V; storage 52.8V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowerControl and PowerAssist:\u003c\/strong\u003e Built‑in functions to limit AC input current and supplement grid or generator power from the battery when required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC outputs:\u003c\/strong\u003e Main output with no‑break functionality; second output live only when AC input is present (for non‑critical loads).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommunication:\u003c\/strong\u003e VE.Bus for parallel\/three‑phase and system integration; general purpose communication ports; support for GX devices and VRM remote monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection features:\u003c\/strong\u003e Against output short circuit, overload, high and low battery voltage, high temperature, AC back‑feed on output and high input voltage ripple (see datasheet protection key).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Steel, blue RAL 5012, IP22.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery connections:\u003c\/strong\u003e Four M8 bolts (two positive, two negative).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC connections:\u003c\/strong\u003e Screw terminals 13mm² (6 AWG).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (H × W × D):\u003c\/strong\u003e 499 × 268 × 141mm (48\/3000 model).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 19kg (48\/3000 model).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature range:\u003c\/strong\u003e −40°C to +65°C (fan‑assisted cooling), humidity up to 95% non‑condensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Safety EN‑IEC 60335‑1, 60335‑2‑29, 62109‑1, 62109‑2; EMC EN 55014‑1\/‑2, EN‑IEC 61000‑3‑2\/‑3; generic immunity\/emission IEC 61000‑6‑1\/‑2\/‑3.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDocuments available for download\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(43, 0, 255);\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/Rutland-FM1803-Datasheet-SB-145A.pdf?v=1783586069\" target=\"_blank\"\u003eMarlec Rutland FM1803‑2 Furlmatic Windcharger – Datasheet (PDF)\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(43, 0, 255);\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/FM1803-Manual-SM-146G-011120.pdf?v=1783586505\" target=\"_blank\"\u003eMarlec Rutland FM1803‑2 Furlmatic Windcharger – Installation \u0026amp; User Manual (PDF)\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(43, 0, 255);\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/R12-200AGM.pdf?v=1783936752\" target=\"_blank\"\u003eRolls R12‑200AGM Battery – Datasheet (PDF)\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/Victron_MultiPlus_II_Datasheet.pdf?v=1783671887\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003eVictron MultiPlus‑II 48\/3000\/35‑32 – Datasheet (PDF)\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eShipping and support\u003c\/h2\u003e\n\u003cp\u003eShipping available to the UK, Ireland, Africa, the Caribbean and worldwide. If a shipping rate is not shown at checkout, please contact us on +44 20 8064 0335 or \u003ca href=\"mailto:info@energian.co.uk\"\u003einfo@energian.co.uk\u003c\/a\u003e for a quotation.\u003c\/p\u003e\n\u003cp\u003eUK expert support is available – contact us with any questions or support requests via phone, email or live chat, or visit our office for an in‑person consultation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Marlec","offers":[{"title":"Default Title","offer_id":57667291152766,"sku":"FM1803-4.5-3000","price":6606.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/marlec-rutland-fm1803-2-850wp_1_1beea3bb-51e0-4677-8989-87f3a7c3ca96.jpg?v=1783671980","url":"https:\/\/www.energian.co.uk\/products\/off-grid-wind-power-system-of-marlec-fm1803-2-48v-wind-turbine-840w-9-6kwh-battery-multiplus-ii-3kw-inverter","provider":"Energian","version":"1.0","type":"link"}